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No. 528,347. Patented'oct. 30,1394.

(No Moae1.)`

2 sheets-sheen 2. S. C.v SHEPARD.

ROTARY FORGE PUMP.

Patented OG t. 30, 1894*.

fWM/ fw/ THE Nonms PETERS ou. vHoroLlTNu.. wAsninsoN u c UNITED STATESPATENT OFFICE.

SYLVANDER O. SHEPARD, OF IfIANNIBAL-MISSOURI, ASSIGNOR OF ONE-HALF TOCORNELIUS A. TREAT, OF PLACE.

ROTARY Fo Rc E- Pu M P.

SPECIFICATION forming partr of Letters Patent No. 528,347, dated October30, 1894. Application led May 7| 1894. Serial No. 510,268. (No model.)

To a/ZZ whom t mag/concern:

Beit known that I, SYLVANDER C. SHEPARD, of the city of Hannibal, Marioncounty, State of Missouri, have invented certain lnew and usefulImprovements in Rotary Force-Pumps, of Which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming a part hereof.

The object of this invention is to'provide improved means for pumpingwater, in whichl are employed combined suction and forcing iniuences. pp

To this end, my invention consists in the construction, combinationandarrangernents of parts, hereinafter described, pointed out l in myclaim, and illustrated by the accompanying drawings, in which- Figure 1is a side elevation of the complete device. Fig. 2 is a sectionalelevation on the line 2-2 of Fig. 1. Fig. 3 is a sectional elevation onthe line 3-3 of Figs. 2 and 4. Fig. 4 is an enlarged sectional plan onthe line 4-4 of Fig. 2. Fig. 5 is a perspective view of one of theVanes.

vIn the construction of the device as shown, the numeral 10 designates abase, and 11 an approximately annular shell formed on, or fixed to, saidbase and supported thereby. Fixed to the shell 11, in parallel planesand inclosing the sides of said shell, are plates 12, 13, on whichplates are formed annular iianges 14, 15 adapted to fit in annularrecesses in the said shell. Centrally located in bearings formed in theplates 12,- 13, and extending transversely of the shell 11, is a drivenshaft 16 provided with, and adapted to revolve in, stuffing-boxes 17,18.

Located Within the cylinder formed by the shell and plates, and rigidlymounted upon the shaft 16, is a head 19 comprising a body portion andplates 19a, mounted on said body portion and adapted for engagement withthe inner faces ofthe 'plates 12, 13, the periphery of which head is.concentric-with the interior face of said shell and at such a distancetherefrom as to form water passages 20, 2l.

Formed on, and extending inwardly from, the shell 11 are abutments 22,23, which abutments are provided with semi-circular faces and arelocated diametrically opposite each other, the apicesof thesemi-circular faces being adapted for engagement and sliding contactwith the periphery of the head 19.

Depressions 22u and 23 are formed in the interior face of the shell 11on opposite sides of the abutments 22, 23, respectively. Semicylindricalconcavities, ordepressions, 24, 25 areformed in the periphery of thehead 18 between the plates, and mounted within said concavities androtatably connected to the plates of said head, are vanes 26, 27 havingtwo'semi-circular concaved opposite sides and two convex opposite sides,the convex opposite sides being adapted for alternate engagement withthe inner face of the shell 1l, the semi-circular opposite sides beingadapted for alternate engagement With the semi-circular faces of theabutments 22, 23. tions between said vanos and the plates comprisetrunnions 28 mounted for revolution in bearings formed in said plates,the construction of the Vanes 26, 27 being clearly shown in Fig. 5.

An inductionyport 29 is provided in one side of the shell 11, and aneduction port 30 is provided inthe side of the shell 11diametricallyopposite to the induction port. A water induction pipe 31kcommunicates with the port29, anda waterfexhaust, or discharge, pipe32communicates with the port 30, the pipe 31- leading froma source ofwater supply, the pipe 32 leading to a point of discharge of the Water,or use thereof.

An induction passage 33 is formed in the shell 11 adjacent to the port29, said port 29 communicating with the said passage at approximatelythe central portion'thereof. The passage 33 leads both ways from theport29 to points of discharge Within the passages 2O and 21 at the lower andupperends thereof, respectively.

An exhaust passage 34 is formed in the The connecshell 11, opposite tothepassage 33, and com- The upper end portions of the passages 33, 34overlap, or cross, each other and respectively communicate with ports35, 36 in the abutment 23, the said ports affording communicationbetween the said passages and the passages 20, 21 at the upper ends ofsaid latter passages, and on opposite sides of the said abutment. Thelower end portions ofthe passages 33, 34 communicate with the lower endsof the passages 20, 21, by means of ports 37, 38, respectively formed iuthe abutment 22 and opening from opposite sides thereof.

The shaft 16 is-adapted to be geared to a prime mover of any desiredcharacter, but I preferably employ for that purpose the rotary engineinvented by me and described in an application for United StatesLetters-Patent bearing even date herewith.

In the practical operation of this machine, the parts being in theposition shown in Fig. 3, upon the rotation of the shaft 16 in thedirection of the arrow 39, the head 19 will be rotated conj unctivelywith said shaft and advance the vane 26 along the passage 20, the saidvane being retained against rotation by the engagement of one of itsconvex faces with the inner face of the shell. The apices of the facesof the abutments 22, 23 engaging with the periphery of the head 19,provide an approximately water and air tightjoint between thesaid-abutments and head, and, therefore, the advancement of the vane 26along the passage 20 creates a vacuum in said passage at the rear ofsaid vane, which said vacuum is supplied through the port 37 and lowerportion of the passage 33, the port 29 and the water induction pipe 3l.ln the rotation of the head 19 the vane 27 will be moved along thepassage 21, and, by reason of the before mentioned tight joint betweenthe abutments and the periphery of the head,

l such advancement of the vane will result in the creation of a vacuumin said passage 21 at the rear of the said vane 27, which said vacuum issupplied through the port 35, the upper end portion of the passage 33,the port 29 and the water induction pipe 3l. The continued advancement,therefore, of the vanes 26, 27 conjunctively results in the creations ofvacuums acting upon and infiuencing the contents of the water inductionpipe, and through well known principles of hydraulics, elevating waterthrough said pipe. The advancement of the vane 26 along the passage 2Oresults in the disturbance, or removal, of the contents of said passagein ad- Vance of said vane, thesaid contents being thus acted uponpassing from the passage 20, through the port 36, into the upper portionof the passage 34, through the port 30 and pipe 32 to points ofdischarge. The advancement of the vane 27 along the passage 21 resultsin the disturbance of the contents of said passage in advance of thesaid vane, the

said contents being thereby removed through the port 3S into the lowerportion of the passage 34, and through the port 30 and pipe 32 to pointsof discharge. It will be observed, therefore, that the conjunctiveadvancement of the vanes 26, 27 not only creates a vacuum to the rear ofsaid vanes, but exerts a forcing, or impelling, inluence within saidpassage in advance of said vanes.

It is obvious that were it not for the abutments 22, 23 providingobstructions to the passage of the water in a plane concentric to thehead 19 and in contact therewith, such vacuum would not be created, andsuch impelling influence would not be exerted. It is, therefore,necessary that a means be provided whereby the vanes may avoid, or pass,the said abutments, which means are to be found in the pivotal mountingof the vanes and the semi-circular side faces on said vanes, adapted forengagement and sliding contact with the said abutments. It will beobserved, therefore, that in the advance of the vanes, one cornerthereof will engage in the depression 23 rst reached thereby, and,contacting with the adjacent side of the abutment 23, be rotated upontheir axes, bringing one of their semi-circular, or concaved, faces,into contact with the semi-circular face of such abutment, and therebypermitting the passage thereof beyond such abutment, the said vanesbeing rotated a one-half revolution upon each contact thereof with anabutment. The continued rotation of the head 19 necessitates asuccessive and intermittent contact of the vanes 26, 27 with theabutments, and, consequently, tion of such vanes, thus insuring an equaland uniform wear upon all sides of said vanes and the said abutments.

It will be observed that in the rotation of the vanes 26, 27, thecorners thereof engage with the faces of the concavities 24, 25 andtravel in an orbit co-incident with the arc of such concavities.

lt will be observed, by reference to Fig. 4y

that the passages 33, 34, in order to overlap, must diverge from a truevertical plane, and be carried parallel to each other for a distance.

It is obvious that this pump may be employed to elevate and impel oil,water, or any liquid substance.

A rotary pump, comprising a cylinder having inwardly extending abutments22, 23, a shaft mounted for rotation in said cylinder, a head rigidlymounted upon said shaft and adapted for peripheral engagement with saidabutments and lateral engagement with said cylinder, passages 20, 21between said cylin`- der and the periphery of said head, vanes rotatablymounted upon the said head and traveling in said passages, means wherebyIOO a successive and intermittent rota- IIO said Vanes may pass the saidabutments, an induction passage 33 affording communication between aninduction port 29 and one` end of the passage 21 and the opposite end ofthe passage 20, and an eduction passage affording communication betweenan exhaust port 30 and the respectively opposite ends of the passages20, 21, the ports of communication between the induction passages andthe

